from math import sqrt


def add(x, y):
    return x + y


def sub(x, y):
    return x - y


def mul(x, y):
    return x * y


def division(x, y):
    return x / y


def be_divisible(x, y):
    return x // y


def surplus(x, y):
    return x % y


def power(x, y):
    return x ** y


def sqrt1(x):
    return sqrt(x)


if __name__ == "__main__":
    print(add(1, 2))
    print(sub(2, 1))
    print(mul(5, 6))
    print(division(9, 3))
    print(be_divisible(8, 5))
    print(surplus(5, 2))
    print(power(5, 3))
    print(sqrt1(9))